+--------------------------------------------------------+
| You now have successfully built and installed the |
| Apache 1.3 HTTP server. To verify that Apache actually |
| works correctly you now should first check the |
| (initially created or preserved) configuration files |
| |
| /usr/local/apache/conf/httpd.conf |
| and then you should be able to immediately fire up |
| Apache the first time by running: |
| |
| /usr/local/apache/bin/apachectl start |
| |
| Thanks for using Apache. The Apache Group |
| http://www.apache.org/ |
+--------------------------------------------------------+

Generating files
updating cache ./config.cache
creating ./config.status
creating php4.spec
creating main/build-defs.h
creating scripts/phpize
creating scripts/php-config
creating sapi/apache/libphp4.module
creating sapi/cli/php.1
creating main/php_config.h
creating main/internal_functions.c
creating main/internal_functions_cli.c
+--------------------------------------------------------------------+
| License: |
| This software is subject to the PHP License, available in this |
| distribution in the file LICENSE. By continuing this installation |
| process, you are bound by the terms of this license agreement. |
| If you do not agree with the terms of this license, you must abort |
| the installation process at this point. |
+--------------------------------------------------------------------+
| *** NOTE *** |
| The default for register_globals is now OFF! |
| |
| If your application relies on register_globals being ON, you |
| should explicitly set it to on in your php.ini file. |
| Note that you are strongly encouraged to read |
| http://www.php.net/manual/en/security.globals.php |
| about the implications of having register_globals set to on, and |
| avoid using it if possible. |
+--------------------------------------------------------------------+
Thank you for using PHP.

# make

Build complete.
(It is safe to ignore warnings about tempnam and tmpnam).

make[1]: Leaving directory `/usr/src/apache_1.3.33'
+--------------------------------------------------------+
| You now have successfully built and installed the |
| Apache 1.3 HTTP server. To verify that Apache actually |
| works correctly you now should first check the |
| (initially created or preserved) configuration files |
| |
| /usr/local/apache/conf/httpd.conf
| |
| and then you should be able to immediately fire up |
| Apache the first time by running: |
| |
| /usr/local/apache/bin/apachectl start
| |
| Thanks for using Apache. The Apache Group |
| http://www.apache.org/ |
+--------------------------------------------------------+

参考：

If you want your server to continue running after a system reboot , you should add a call to apachectl to your system startup files (typically rc.local or a file in an rc.N directory). This will start Apache as root. Before doing this ensure that your server is properly configured for security and access restrictions.

# KeepAlive: Whether or not to allow persistent connections(more than
# one request per connection). Set to "Off" to deactivate.

# KeepAlive Off

# MaxKeepAliveRequests: The maximum number of requests to allow
# during a persistent connection. Set to 0 to allow an unlimited amount.
# We recommend you leave this number high, for maximum performance.

# MaxKeepAliveRequests 0

# KeepAliveTimeout: Number of seconds to wait for the next request
# from the same client on the same connection.

----------------------------------------------------------------------
Libraries have been installed in:
/usr/local/apache2/modules
If you ever happen to want to link against installed libraries
in a given directory, LIBDIR, you must either use libtool, and
specify the full pathname of the library, or use the `-LLIBDIR'
flag during linking and do at least one of the following:
- add LIBDIR to the `LD_LIBRARY_PATH' environment variable
during execution
- add LIBDIR to the `LD_RUN_PATH' environment variable
during linking
- use the `-Wl,--rpath -Wl,LIBDIR' linker flag
- have your system administrator add LIBDIR to `/etc/ld.so.conf'
See any operating system documentation about shared libraries for
more information, such as the ld(1) and ld.so(8) manual pages.
----------------------------------------------------------------------
chmod 755 /usr/local/apache2/modules/mod_limitipconn.so
[activating module `limitipconn' in /usr/local/apache2/conf/httpd.conf]

检查 httpd.conf 文件，发现增加了一下一行

LoadModule limitipconn_module modules/mod_limitipconn.so

同时需要设置以下参数在 httpd.conf 中 , 也可以在单个虚拟服务器中。

ExtendedStatus On
# Only needed if the module is compiled as a DSO
LoadModule limitipconn_module lib/apache/mod_limitipconn.so
<IfModule mod_limitipconn.c>
<Location /somewhere>
MaxConnPerIP 3
# exempting images from the connection limit is often a good
# idea if your web page has lots of inline images, since these
# pages often generate a flurry of concurrent image requests
# NoIPLimit image/*
# In this case, all MIME types other than audio/mpeg and video*
# are exempt from the limit check
# OnlyIPLimit audio/mpeg video
</Location>
</IfModule>

Filename must resolve to a document with a major content type of text/* ( e.g. , text/html , text/plain , etc.). This means that filename may refer to a CGI script if the script's actual file type (as opposed to its output) is marked as text/html such as with a directive like:

AddType text/html .cgi
Content negotiation will be performed if Options MultiViews is in effect. If filename resolves to a static text/html document (not a CGI script) and either one of the options Includes or IncludesNOEXEC is enabled, the file will be processed for server-side includes (see the mod_include documentation).